J. Stein: Field theoretic treatment of the strong-coupling attractive Hubbard model with diagonal disorder, J. Phys. Condens. Matter 5 (1993) 371
We present a field theoretic formulation of the strong-coupling attractive Hubbard model with Gaussian distributed random on-site energies. Selfconsistency equations for the order parameters of superconductivity and charge ordering are derived at lowest loop order and solved for the limiting cases of weak and strong disorder. We also study dynamical properties and calculate the influence of disorder on the Bogoliubov-Anderson mode in the superconducting phase.